He is on a fast track to McLaren. I think McLaren is on a hunt after being bled dry for the past decade. If you think about it, McLaren was the only team who didn’t make any high level technical hires, but instead always promoted from within. But even they don’t have an endless supply of talent, and I think they are now on a mission to get back experienced guys, to rebuild the core. Sort of a critical mass, around which they can start cultivating talent on a large scale again.
They have everything in place. They will have their #1 engine manufacturer behind them again, they will have a lot of money and they will need to add just few more pieces to start a new era.

Could he join Alonso at Ferrari, he was part of the Renault team that won 2 world championships. But I doubt it if he was to go to Ferrari he may not as much impact till 2016 and onwards possibly. Could see him going elsewhere to be the main man.

Mercedes has skimmed the cream and are getting rid of the rest. Some other team will scoop him up and he will do great. Even Mercedes castoffs are highly talented or they wouldn’t have been there in first place.